Electric heating unit for radiators



Oct. 19, 1937., c. a GOODWIN ELECTRIC HEATING UNIT FOR' RADIATORS File@ June 25, 193@ 2 Sheets-Sheet l Get. 19, 1937. c. B. GOODWIN ELECTRIC HEATING UNIT FOR RDIATORS Filed June 25, 1936 2 Sheets-Sheet 2 Patented Oct. I9, 1937 UNITED STATES PATENT ori-Ica amas morale animo UNrr ron mxs'rons cunt n. Goodwin, Indianapolis. ma. Application June 25, 1938, Serial No. 87,283 s claim. (c1. zio-ss) This invention relates to a heating unit for radiators of the hot water or other liquid type.

It is aimcd to provide a construction which is generally improved, having a tube or housing forming part of the radiator in which the heating means is disposed and through which the liquid circulates, the apparatus having means whereby the heating unit may be removed and replaced, without leakage or escape of the liquid. The more specific objects and advantages will become apparent from a consideration of the description following taken in connection with accompanying drawings illustrating an operative embodiment. 16 SIn said drawings:-

Flgure 1 is a view of a radiator equipped with my improvements, being primarily in# side elevation and partly in section to disclose details;

Figure 2 is an end elevation of said radiator;

Figure 3 is an enlarged vertical longitudinal sectional view through the heating unit and adjacent parts of the radiator;

Figure 4 is a vertical sectional view through the heating unit detached;

Figure 5 is a vertical sectional view taken on the line 5 5 of Figure 3; and

Figure 6 is a vertical sectional view taken on the line 6 6 ofFlgure 3. K

Referring specifically to the drawings wherein like reference characters designate like or simivlar parts, I 0 designates a radiator consisting of vertical legs or coils l I, in spaced relation, and all communicating at the top and bottom. 'I'he radiator contains water or any other desired liquid. Legs I2 are provided on the radiator as well as a filling tube I3 adjacent the top thereof.

Cast integrally or otherwise provided at the bottom of the radiator is a wall I l providing a compartment I5 having an inlet opening at its 4o inner end wall at the bottom thereof as at I6, and having an outlet opening in its top as at I1 communicating with the central leg or coil il at one end of the radiator. 'I'he wall I 4 and compartment I5 may be of any desired length and the same 4communicate only with the central row of coils or legs by the single inlet and single outlet shown, so that the heating element hereinafter described, will cause circulation of the water or liquid through the radiator according to the various arrows shown in the drawings.

Removably disposed within the compartment I5 is a shell or tube I8. preferably of brass. Such shell or tube I8 is closed at its inner-end and at its other end is open and brazed or welded as at I9 to a suitable bushing 20 having standard exterior screw threads at 2I and standard interior `screw threads at 22. The screw threads 2i removably engage screw threads 22 provided integrally on the wall Il of the joint being sealed. packed, or made water tight in any desired li manner. Located removably within the shell Il is the heating element 24 as best detailed in Figure 4. This heating element consists of a core 25 conveniently made of porcelain or other insulating 10 material and is carried by a ring or attaching nipple 26 also preferably made of porcelain.

The core 25 is telescoped into the nipple 2l at a reduced portion 21, cementitious material being used to secure such parts together as at 2l. 15

'I'he core 25 has a spiral peripheral groove Il occupied by a resistance coil or heating element 2|. It is clear that any desired number of coils or convolutions of the heating element 2l may be used as preferred. A cable in communication 20 with any suitable source of electric energy is shown at 32 having conductors 32 and 24, both of which extend through the bore of the nipple 25 and respectively through passages 25 and I2 in the core, and being connected to the opposite 2g ends of the heating coil Il or at any desired coils thereof. A cover 31 is preferably telescoped over a part of the nipple 26, having a iiange secured by means of screws 38 to the bushing 20. The cable 32 may be anchored to a block oi' insulaal tion 39, carried by the cover 31.

Surrounding the core and heating coil carried thereby is a tube of porcelain insulating cement or other insulating material which is shown at Il and which is secured in place by the previously mentioned binding or cementitious material 22. Primarily to prevent rattling and to maintain the parts tight, a ring of asbestos may surround the tube l0 at 4I and engage the inner wall of the shell I8. p 42 It will be realized that when the heating element is energized, its heat willbe imparted to the water within the space I5 and that such heat will cause the water to circulate and ilow in the directions of the arrows. It will also be clear, 4l that in case of inspection, repair or substitution, the heating element may be removed since the -shell I8 will remain in place and prevent leak# age or escape of the water or other liquid used in the radiator. It will also be clear that the 50 radiator is preferably of that type having thermostatic means associated therewith and forming no part of my invention, which will out oi!l and restore the flow of electric energy, within predetermined temperature limits. 55

lis

I claim as my inventionzl. A heating element ot the class described having a core, an attaching nipple connected thereto, said core having a peripheral groove. a heating element disposed in said groove, conductors extending through the core to the heating element, and a. tube of insulating material about the core and heating element, ,said insulating material. core and nipple being initially separate,'and binding material securing them in unitary relation, an attaching bushing screw threaded to the nipple, a cover telescoped over the nipple, and means detachably securing the cover to @the bushing.

2. A heating element of the class described having a core, an attaching nipple connected thereto, said core having a peripheral groove, a

' heating element disposed in said groove, conductors extending through the core to the heating element, and a tube of insulating material about the core and heating element, said insulating material, core and nipple being initially separate, and binding material securing them in uniat v j" relation, an attaching bushing s crew threaded to the nipple, a cover telescoped over the v ticned screw threads.

nipple.. means detachably securing the rcover to the bushing, anda cable carrying the said conductors having a block carried by the said cover.

3. A- heating element of the class described having a core. an" attaching nipple connected thereto. said core' having a peripheral groove, a heating element disposed ln said groove, conductors extending through the core to the heating element, and a tube at insulating material about the core and yheating element, said insulating material, care and nipple `being initially separate, and binding material securing them in unitary relation, an attaching bushing screw threaded to the nipple, a cover telescoped over the nipple.' means-kletachably securing the cover to the bushing, a cable carrying the said conductors having a block' ,carried by the said cover, in combination 'with packing between the .insulating tube and shell,A -and a radiator having a wall pro- .vidinsf spacefin which the Shes dismsed said VWall having screw threads, and said bushing having screw threads engaging the last men- 

